Do lawyers need originals of all materials for litigation?

Legal analysis: whether the copy is direct evidence depends on whether it can directly prove the facts of the case, and if it can, it is direct evidence; If not, the copy is circumstantial evidence. If the copy is to be used as direct evidence, the following conditions must be met: (1) single piece of evidence; (2) Being able to prove the main facts of the case; (3) The proof method is direct, and no reasoning is needed. The relationship between direct evidence and the main facts of the case is direct. Legal basis: Original documentary evidence shall be submitted in Article 68 of People's Republic of China (PRC) Civil Procedure Law. Physical evidence shall be submitted in its original form. If it is really difficult to submit the original or the original, copies, photos, duplicates and excerpts may be submitted. Article 78 of the Supreme People's Court's Opinions on Several Issues Concerning the Application of the Civil Procedure Law of People's Republic of China (PRC) is a copy. If the provider refuses to provide the original or the clue of the original, and there is no other material to prove it, and the other party refuses to admit it, it shall not be used as the basis for ascertaining the facts in the lawsuit.